MusicStacker is
compatible with: Napster (wma), iTunes (m4p, m4a), iPod and other online music
store. MusicStacker disables DRM in the file/copy that it creates.The copy can be burned to CD or moved to any
mp3 player “To Go”. DRM means digital rights management. This is simply the
best way to remove DRM from your music. DRM Removal has never been easier.

Note that:
iTunes ,Napster, and iPod are not trade mark of New Concept Software